When the shallow air flotation device is started, first add water to the air flotation tank to make the water level of the air flotation machine reach the screw propeller. The water level of the air flotation pool can be controlled by the water outlet adjustment board. Close all control valves, turn the electrical knob switch to the automatic position, start the water pump, the air compressor also enters the automatic working state, and then open the water pump inlet valve and outlet valve, the pressure of the pressure gauge gradually rises to 4 kg.

Open the water control valve of the air flotation and dissolved gas tank, and let the dissolved air and mixed water pass through the releaser to release the flocculation and mixing section of the air flotation tank. A large number of fine bubbles appear in the air flotation tank, making the clear water milky white. Air compressor is provided. As the dissolved air water continuously takes away the air in the tank, the air in the tank gradually decreases and the water level rises. When the water level rises to a certain position, the float level gauge will control the operation of the air compressor so that there is enough air in the cylinder.

After the shallow air flotation system operates normally, the sewage after the dosing reaction is sent to the air flotation mixing tank, the amount is smaller at first, and then gradually increases after normal. First use tap water as reflux water, and then use treated clean water as reflux water when normal. If there are too many impurities in the reflux water and the effect of air flotation, you can always use clean water.

The truss-type slag scraper is turned on for a long time to prevent too much suspended matter from affecting the water output effect. When shallow air flotation stops, close the sewage control valve, then close the sewage pump to scrape the scum off, then open the clean water valve, run for 30 minutes with tap water, close the dissolved gas, effluent, and water inlet control valve and then stop the clean water pump.

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